GNU Free Documentation License, v1.1
GNU Free Documentation License, Version 1.1, March 2000
Copyright (C) 2000 Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. Everyone is
permitted to copy and distribute verbatim copies of this license document, but changing it is not allowed.
The purpose of this License is to make a manual, textbook, or other written document "free" in the sense of freedom:
to assure everyone the effective freedom to copy and redistribute it, with or without modifying it, either commercially
or noncommercially. Secondarily, this License preserves for the author and publisher a way to get credit for their
work, while not being considered responsible for modifications made by others.
This License is a kind of "copyleft", which means that derivative works of the document must themselves be free in
the same sense. It complements the GNU General Public License, which is a copyleft license designed for free
We have designed this License in order to use it for manuals for free software, because free software needs free
documentation: a free program should come with manuals providing the same freedoms that the software does. But
this License is not limited to software manuals; it can be used for any textual work, regardless of subject matter or
whether it is published as a printed book. We recommend this License principally for works whose purpose is
instruction or reference.
APPLICABILITY AND DEFINITIONS
This License applies to any manual or other work that contains a notice placed by the copyright holder saying it can
be distributed under the terms of this License. The "Document", below, refers to any such manual or work. Any
member of the public is a licensee, and is addressed as "you".
A "Modified Version" of the Document means any work containing the Document or a portion of it, either copied
verbatim, or with modifications and/or translated into another language.
A "Secondary Section" is a named appendix or a front-matter section of the Document that deals exclusively with the
relationship of the publishers or authors of the Document to the Document's overall subject (or to related matters) and
contains nothing that could fall directly within that overall subject. (For example, if the Document is in part a
textbook of mathematics, a Secondary Section may not explain any mathematics.) The relationship could be a matter
of historical connection with the subject or with related matters, or of legal, commercial, philosophical, ethical or
political position regarding them.
The "Invariant Sections" are certain Secondary Sections whose titles are designated, as being those of Invariant
Sections, in the notice that says that the Document is released under this License.
The "Cover Texts" are certain short passages of text that are listed, as Front-Cover Texts or Back-Cover Texts, in the